The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 06, 2013
Filed:
Sep. 07, 2011
Chikara Aoshima, Zama, JP;
Naoto Mochizuki, Minamikoma-gun, JP;
Chikara Aoshima, Zama, JP;
Naoto Mochizuki, Minamikoma-gun, JP;
Canon Kabushiki Kaisha, , JP;
Nisca Corporation, , JP;
Abstract
A light amount adjustment device including a motor which can be reduced in size by reducing radial and axial dimensions and makes it possible to increase the motor output. The device has a stator of a motor drive mechanism formed integrally with a holding member fixed to a cam member with aperture blades and a rotary member for driving them sandwiched therebetween. A stator includes a support portion, and first and second magnetic pole portions. The first and second magnetic pole portions extend toward an outer periphery of the rotor and coils are inserted thereon from respective extending ends. The extending ends are disposed in a manner opposed to the outer periphery of the rotor. The two portions are disposed with an angle therebetween such that respective lines extending in the extending directions intersect with each other.